Python中json库的操作指南

import json
res = json.loads(s)  # s是json类型的字符串
print(res)  # 打印字典
print(type(res))  # 打印res类型
print(res.keys())  # 打印字典的所有key

f = open('stus.json',encoding='utf-8')
content = f.read() # 使用loads()方法需要先读文件
user_dic = json.loads(cotent)
print(user_dic)

import json
f = open('stus.json',encoding="utf-8")
user_dic = json.load(f)
print(user_dic)

stus = {'xiaojun':'123456','xiaohei':'7891','abc':'11111'}
res2 = json.dumps(stus)   # 先把字典转成json
print(res2)
print(type(res2))

with open('stus.txt','w',encoding='utf-8') as f: # 打开文件
    f.write(res2)  # 在文件里写入转成的json串

stus={'xiaojun':'123456','xiaohei':'7890','lrx':'111111'}
file = open('stus2.json','w',encoding='utf-8') 
json.dump(stus,file,indent,ensure_ascii=False)  # 直接写入文件中，ensure_ascii为False时内容输出显示正常的中文，而不是转码